Preparation of amino polyols

Claim 2

In a process for preparing a modified amino polyol which comprises: (a) mixing an amino polyol initiator with an alkylene oxide selected from the group consisting of ethylene oxide, propylene oxide, 1,2-butylene oxide, styrene oxide, glycidol and mixtures thereof; (b) reacting and digesting the initiator with the alkylene oxide at a temperature of 30° C. to 180° C. to form a crude polyol mixture comprising an alkoxylated amino polyol with hydroxyl number of 300 to 900 and residual alkylene oxide; wherein the improvement comprises: (c) reacting the residual alkylene oxide with a second amine in situ at a temperature of 30° C. to 180° C. to form an alkanol amine.

Claim 3

The process of claim 1 wherein the initiator has an active hydrogen functionality equal to or greater than three.

Claim 4

The process of claim 1 wherein the initiator has an active hydrogen functionality of four to eight.

Claim 5

The process of claim 1 wherein the initiator is a sucrose polyol mixed with a first amine.

Claim 6

The process of claim 1 wherein the initiator is a sucrose polyol selected from the group consisting of sucrose, sorbitol, methyl glucoside and starch glucosides mixed with a first amine.

Claim 7

The process of claim 4 wherein the first amine is an alkanol amine.

Claim 8

The process of claim 4 wherein the first amine is an alkanol amine selected from the group consisting of monoethanol amine, diethanol amine, triethanol amine, hydroxyethyl-aminoethyl ether, isopropanolamine, diisopropanol amine and triisopropanol amine.

Claim 9

The process of claim 4 wherein the first amine is selected from the group consisting of ammonia, methylamine, ethylenediamine, isopropanolamine, diisopropanolamine, triisopropanolamine, 1,3-propanediamine, diethylenetriamine, triethylenetetramine, hexaethyleneheptamine, imino-bis-propylamine, ethanolamine, diethanolamine, triethanolamine, aminoethylethanolamine, benzylamine, piperazine, toluene diamine and aniline.

Claim 10

The process of claim 1 wherein the second amine is selected from the group consisting of ammonia, a primary amine and a secondary amine.

Claim 11

The process of claim 1 wherein the second amine is selected from the group consisting of ammonia, monoethanol amine and diethanol amine.

Claim 12

The process of claim 1 wherein the second amine is selected from the group consisting of ammonia, methylamine, ethylenediamine, 1,3-propanediamine, diethylenetriamine, triethylenetetramine, hexaethyleneheptamine, imino-bis-propylamine, ethanolamine, diethanolamine, triethanolamine, isopropanolamine, diisopropanolamine, triisopropanolamine, aminoethylethanolamine, benzylamine, piperazine, toluene diamine and aniline.

Claim 13

The process of claim 1 wherein the initiator is an aromatic amino polyol.

Claim 14

The process of claim 1 wherein the initiator is an aromatic amino polyol selected from the group consisting of Mannich condensates of phenolic compounds, aniline-formaldehyde condensates, phenol-formaldehyde condensates and mixed condensates of phenol, aniline and formaldehyde.

Claim 15

The process of claim 1 wherein the alkylene oxide is propylene oxide.

Claim 16

The process of claim 1 wherein the alkylene oxide is a mixture of propylene oxide and ethylene oxide.

Claim 17

The process of claim 1 wherein the initiator is the reaction product of sucrose and triethanol amine.

Claim 18

In a process for preparing a modified amino polyol for use in preparing rigid polyurethane foams which comprises: (a) mixing a phenol, a first alkanol amine, and formaldehyde (b) heating the resulting mixture at a temperature of from 50° C. to 150° C. for a period of time sufficient to reduce the formaldehyde content to no more than about 1%; (c) stripping water from the reaction product; (d) adding at a temperature of 30° C. to 180° C. an alkylene oxide selected from the group consisting of ethylene oxide, propylene oxide, 1,2-butylene oxide, styrene oxide, glycidol and mixtures thereof to the stripped reaction product at a temperature of 30° C. to 180° C. to form a crude polyol mixture comprising alkoxylated amino polyol with a hydroxyl number of 300 to 900 and residual alkylene oxide; wherein the improvement comprises: (e) reacting the residual alkylene oxide in situ with a second amine at a temperature of 30° C. to 180° C. to form a second alkanol amine.

Claim 19

In a process for preparing a modified amino polyol for use in preparing rigid polyurethane foams which comprises: (a) mixing a phenol, a first alkanol amine, and formaldehyde (b) heating the resulting mixture at a temperature of from 50° C. to 150° C. for a period of time sufficient to reduce the formaldehyde content to no more than about 1%; (c) stripping water from the reaction product; (d) adding at a temperature of 30° C. to 180° C. an alkylene oxide selected from the group consisting of ethylene oxide, propylene oxide, 1,2-butylene oxide, styrene oxide, glycidol and mixtures thereof to the stripped reaction product at a temperature of 30° C. to 180° C. to form a crude polyol mixture comprising alkoxylated amino polyol with a hydroxyl number of 300 to 900 and residual alkylene oxide; wherein the improvement comprises: (e) reacting the residual alkylene oxide in situ with a second amine at a temperature of 30° C. to 180° C. to form a second alkanol amine.